Coal-mining machine



2 Sheets-Sheet l.

(No Model.)

R. JOHNSON.

GOAL MINING MACHINE.

'* Patented Sept. 4, 18,83.-

/ I MW HTHHWWWWW m WITNESSES: INVENTOR:

WWW z? W Y ATTORNEYS.

2 Sheets-Sheet 2. R. JOHNSON.

GOAL MINING MACHINE.

(N0 Model.)

Patented Sept. 4, 1883.

INVENTOR WITNESSES MW $25M ATTORNEYS.

N4 PETERS, Pmwumv n mr, Washinginn. 04c.

UNITED STATES.

PATENT QFFI E.

RICHARD JOHNSON, OF BELLEVILLE, ILLINOIS.

COAL-MINING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 284,560, dated September4, 1883. Application filed April 28, mes. (N0 modelJ To all whom it mayconcern:

Be it known that I, RICHARD J OHNSON, of Belleville, in the county ofSt. Clair and State of Illinois, have invented a new and Improved,Coal-Mining Machine, of which the following is a full, clear, and exactdescription.

My invention consists of a series of clay or earth angers, and means foroperating them to bore out the clay beneath the-coal seams, and alsomeans for quickly withdrawingthe angers after the holes are bored,mounted on a truck suitably for moving the machine along, from time totime, square to the work, the object being to provide means for morequickly removing the clay under the coal than it can be dug away byhand, for providing space to enable the coal to be broken down, all ashereinafter fully described.

Reference is to be had to'the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is aplan view of my improved coalmining machine. Fig. 2 is aside elevation. Fig. 3 is an end elevation. Fig. 4 is a detail sectionalview, and Fig. 5 is a similar view, showing the half-nut.

I make a substantial bed-frame, a, on one side of which I arrange theupright frame b for the support of the driving-gears, which is stayedfrom the other side of the bed-frame by the braces c. Said frame,whichis mounted on low rollers d for moving it along the front of thecoal-heading, carries bearings at e and f, in the side bars, for thelong shafts g, which are the anger-shanksof clay or earth angers h,which project from the side of the frame whereon the braces 0 rest. Fromthe opposite side of the bed-frame theseshafts extend equal to thelength the angers are to be worked into the clay, and they arescrew-threaded in the extended parts g, to feed the angers into the workby means of feed-nuts 0, through which they work, at the same time thatthey are revolved for turning the angers, which is to be accomplished bymeans of worm-wheels h, fitted on themwith a feather or spline, and madeto revolve bythe worms i on the shaft j,which is geared by the wheels klwith the crankshaft m, to which the power is to be applied by hand,with the crank-pins a, the shaft being mounted in the upper part of theupright frame 1). l

For the nuts 0, through which the screw shafts are to be forced, wepropose to employ one or more half-nuts, 0, that may be dropped in orotherwise applied to boxes 12, from which they may be readily removedwhen it is desired'to withdraw the angers, in order that it may be donemore quickly by the toothed wheels q and racks 8, applied to the shaftsg, than can be done by screwing the angers back, and thus economizingtime and labor in the operation of the machine. When the angers areboring into the coal and the half-nuts o are in place in the shafts g,the wheelsqare mere idlers gearing with the rack s; but when it isdesired to withdraw the augers from the coal-bed, to save time by morerapidly removing them therefrom the halfnuts are removed from theirseats in the shafts g, and the wheels q, in gear with racks s, rapidlyrevolved backward, thus more rapidly withdrawing the shafts bysubjecting them to a backward rectilinear movement without revolving.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

I. The combination, in a mining-machine, of the angers h, having theshafts fitted with a toothed rack-bar, s, also having a screw-section,9, and being geared with feathered driving-wheels h, also withretracting-gears q, and also being provided with detachable half-nuts 0,or equivalent means of disconnecting them from the nuts for withdrawingthe angers by the retract-in ggears, substantially as described.

2. The combination, in a mining-machine, of a series of angers, h,geared with handpower mechanism, substantially as herein de scribed. forworking them, and provided with retracting-gears q s, the said angersand the opening-gears being arranged on the bed-frame at, having uprightb and braces c, and being provided with the truck-wheels d,substantially 'Innon. I. Knorr'r, A. G. BADGLEY.

